RT Article T1 An Ethological Study on Behavioural Differences Between Hyperactive, Aggressive, Combined Hyperactive Aggressive and Control Children JF The journal of child psychology and psychiatry VO 35 IS 8 SP 1437 OP 1446 A1 Buitelaar, Jan K. 1953- LA English YR 1994 UL https://krimdok.uni-tuebingen.de/Record/1639426930 K1 Kinder K1 Hyperaktivität K1 Aggressivität